Improvement in sawing-machines



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JACOB KAU'FFMAN,

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Letters Patent No. 103,892, dated June 7,1870.

IMPROVEMENT IIT SAWINGl-MACKHINE S.

The Schedule referred to in these Letters Patent and making' part of thesame.

To all whom it may concern y Be it known that I, JACOB KAUFFMAN, ofGilboa, in the county of Putnam and State of Ohio, have invented a newandI useful Improvement in Hand-power Striving-Machines; and I dodeclare that the followling is a true and accurate description thereof',refer-- ing, to a drag-saw; also, in the general arrangement of itsvarious parts, as more fully hereinafter set forth.

In the drawing, which shows my device in perspec-` "tive- A represents aframe-work, formingthe bed of the machine, at either end of which isinserted a pair of standards, B C, connected at the top by.a beam, D.

At two-thirds the distance from the front to the rear standards areerected the galiows-frame standards E, in which are pivoted thewalking-beams Y.

G is the driving-shaft, provided with a balancewheel, G', and journaledin the standards B.

H are cranks, placed at right angles with each other, at either end ofthe shaft, and' communicate motion tothe walking-beams Y, through theconnecting-rods I, one of the cranks being provided with a crank-handle,H', through which the shaft is rotated.

J is al shaft, journaled in the standards C, and is provided at eitherend with the quarter-cranks E, which are connected tothe short arms ofthe walkingbeams by the rods L, whereby a continuous rotary motion iscommunicated to the shaft J, on which is keyed a spur-wheel, M, which,in turn, rotates, with increased velocity, a counter-shaft, N, below,through its pinion, O.

I lis a crank-wheel at the end of the counter-shaft, which communicatesa reciprocatory movement to a cross-head moving in the guides Q, througha pit-- man, It.

To the cross-head is attached adrag-saw, S, moving in guides ina-standard, T, near the saw-horse U.

Then not sawing, thesaw is suspended by a cord, V, passing aroundshieves, a b, at the top and bottoni of the standard T, passing to theopposite side of the bed-piece, and terminating in a ring to slip over apin therein, so as to hohtup the saw when not in use.

XV'is aY clamp, bent at the top to hook over the stick to be sawn, andpasses down through the sawhorse, engaging with a treadle, X, pivoted tothe bedpiece, and which engages with a ratchet on the face of one of thestandards B, whereby the stick of.`\vood in the saw-horse' is firmlyheid in place while being sawn.

It will be noticed that the leverage in the cranks and beams increasesfrom the saw toward the driving-l shaft, while the speed increases inthe opposite d ircotion, so that the usually laborious and slowprocesshef sawing wood by hand, with this device is rendered easy andexpeditious.

What I claim as my invention, and desire to secure by Letters Patent, is

The construction of the standards B C F, drivingshaft G, balance-wheelG', quarter-cranks H and handie II', walking-beams Y, connecting-rods IL, shaft J, quarter-cranks K, spur-wheel M, counter-shaft N, pinion '0,crank-wheel I), pitman R, guides Q, saw S, standard T, cord V, shieves ab, saw-horse U, clamp` \V,.and treadle X, al1 arranged on a bed-frame,A, and operating suhstantiallyas herein described, for the purposespecified.

' J AOOB' KAUFFMAN.

Witnesses FREDERICK EBERTs, SAM. J. SPRAY.

